it does look like Sara has a dragon tail.

Satou has a dragon kink and made a prophetic tail?

her expression looks to me more disturbed than just sad about the parting.

Wouldn’t you be if the one you loved forced a tail on you?

But seriously yeah it’s a bit of a mess, I took it as a collage of the volume. But it could defiantly be clearer. I would have gone for Hikaru and the titan for the cover.